S Conclusion

Figure 3.15 presents a summary model of the sub-polar glacier landsystem in the Canadian and Greenland high arctic. Sub-polar glaciers of the Canadian and Greenland high arctic are characterized by a marginal zone of cold-based or frozen ice that passes up-glacier into a zone(s) of wet-based ice. This thermal regime means that sub-polar glaciers are characterized by both subglacial and supraglacial/lateral meltwater systems, and by significant compressive stresses where the zone of wet-based ice passes into the frozen bed of the terminus. These characteristics are reflected geomorphologically and sedimentologically in the sub-polar glacier landsystem. We emphasize that it is the presence of evidence for both wet- and frozen-based thermal conditions that are diagnostic of the sub-polar glacier landsystem, including the abundance of lateral meltwater channels that demarcate former glacier margins.

Figure 3.15 Landsystems model for sub-polar glaciers in the Canadian and Greenland high arctic, concentrating specifically on plateau icefields and piedmont lobes. A = blockfield/residuum, B = thrust-block moraine, C = ice-cored lateral moraine, D = trimline moraine, E = glacier-ice cored protalus rock glacier, F = periglacial protalus rock glacier, G = lateral meltwater channels, H = raised, former ice-contact deltas.

Figure 3.15 Landsystems model for sub-polar glaciers in the Canadian and Greenland high arctic, concentrating specifically on plateau icefields and piedmont lobes. A = blockfield/residuum, B = thrust-block moraine, C = ice-cored lateral moraine, D = trimline moraine, E = glacier-ice cored protalus rock glacier, F = periglacial protalus rock glacier, G = lateral meltwater channels, H = raised, former ice-contact deltas.

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Project Management Made Easy

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